–We should do what we can _____ the endangered animals.` --Yes, it’s duty_____ them.
#50588
A
save, to protect
B
save, protect
C
to save, protect
D
to save, to protect
推荐题目
There 's a teacher _____ with your parents in the teachers' office.
#49948
A
is talking
B
talks
C
to talk
D
talking
Everything seemed _______ so fast and now it’s all over.
#50615
A
happen
B
happened
C
to happen
D
happening